131223133001 has 4 divisors (see below), whose sum is σ = 131223998100. Its totient is φ = 131222267904.

The previous prime is 131223132983. The next prime is 131223133003. The reversal of 131223133001 is 100331322131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 100331322131 = 23 ⋅4362231397.

It can be written as a sum of positive squares in 2 ways, for example, as 49026816400 + 82196316601 = 221420^2 + 286699^2 .

It is a cyclic number.

It is not a de Polignac number, because 131223133001 - 2²⁶ = 131156024137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131223133003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138296 + ... + 530633.

It is an arithmetic number, because the mean of its divisors is an integer number (32805999525).

Almost surely, 2^131223133001 is an apocalyptic number.

It is an amenable number.

131223133001 is a deficient number, since it is larger than the sum of its proper divisors (865099).

131223133001 is an equidigital number, since it uses as much as digits as its factorization.

131223133001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865098.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 131223133001 its reverse (100331322131), we get a palindrome (231554455132).

The spelling of 131223133001 in words is "one hundred thirty-one billion, two hundred twenty-three million, one hundred thirty-three thousand, one".